1032
SAM4CP [DATASHEET]
43051E–ATPL–08/14
45.5.12 Temperature Sensor
The temperature sensor provides an output voltage (V
T
) that is proportional to absolute temperature (PTAT). This voltage
can be measured through the channel number 7 of the 10-bit ADC. Improvement of the raw performance of the
temperature sensor acquisition can be achieved by performing a single temperature point calibration to remove the initial
inaccuracies (V
T
and ADC offsets).
Notes: 1.
Does not include errors due to A/D conversion process.
45.5.13 Optical UART RX Transceiver Characteristics
Table 45-32
gives the description of the optical link transceiver for electrically isolated serial communication with
hand-held equipment, such as calibrators compliant with ANSI-C12.18 or IEC62056-21 norms (only available on
UART1).
Table 45-31. Temperature Sensor Characteristics
Symbol
Parameter
V
VDDIN
Supply Voltage Range (VDDIN)
V
T
Output voltage
Output Voltage sensitivity to
Temperature
dV
T
/ dV
V
T
variation with VDDIN
Conditions
Min
2.5
1.34
Typ
—
1.44
Max
3.6
1.54
Unit
V
V
T
J
= 27° C
dV
T
/ dT
4.2
4.7
5.2
mV/°C
VDDIN from 2.5V to 3.6V
When V
T
is sampled by the 10-bit
ADC, the required track-and-hold
time to ensure 1oC accurate
settling
After offset calibration
Over T
J
range [-40°C : +85°C]
After offset calibration
Over T
J
range [0°C : +80°C]
—
—
1
mV/V
t
S
V
T
Settling time
—
—
1
μ
s
T
ACC
Temperature accuracy
(1)
—
±5
—
°C
—
±4
—
°C
t
ON
I
VDDIN
Startup Time
Current Consumption
—
50
5
10
80
μ
s
μ
A
70
Table 45-32. Transceiver Characteristics
Symbol
Parameter
V
VDDIO
Supply Voltage Range (VDDIO)
Conditions
Min
3
Typ
3.3
25
—
Max
3.6
35
0.1
Unit
V
I
DD
Current Consumption
ON
OFF
—
μ
A
V
TH
Comparator Threshold
According
threshold. See the OPT_CMPTH bit
in the UART Mode Register (UART1)
to
the
programmed
-20
—
+20
mV
V
HYST
Hysteresis
10
20
40
mV
t
PROP
Propagation time
With 100 mVpp square wave input
around threshold
—
—
5
μ
s
t
ON
Startup time
—
—
100
μ
s